BIND script to create PTR records

BIND script to create PTR records

Just in case you ever need to manage an instance of BIND manually, you will have the pain of remembering to update the PTR records. Here's a quick script to create the PTR records

For those of you that are looking for an alternative, I suggest you use PowerDNS as a backend and PowerDNSAdmin as a nice front end

Here's the script

#!/bin/sh

NETWORKS=$(cat << ENDNET
10.10.1
10.10.2
.
.
.
10.10.99
ENDNET
)

REV_HEADER=$(cat <;
; BIND reverse data file for NETWORK
; Do not edit manually, but run /etc/bin/zones/$0
; after editing /etc/bin/zones/mydomain.tld.db
;
\$TTL    604800
@       IN      SOA     mydns-server.mydomain.tld. root.mydns-server.mydomain.tld. (
                         SERIAL         ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800 )       ; Negative Cache TTL
;
@       IN      NS      mydns-server.mydomain.tld.
END
)

for NETWORK in $NETWORKS ; do
    echo $NETWORK
    NEWSERIAL=`grep Serial db.${NETWORK} | awk '{printf "%6s", $1+1}'`
    echo $NEWSERIAL
    echo "$REV_HEADER" | sed -e "s/SERIAL/$NEWSERIAL/" -e "s/NETWORK/$NETWORK/" > db.${NETWORK}.new
    egrep "$NETWORK\." mydomain.tld.db | grep -v '^;' | awk 'split($4, ipaddr, ".") {printf "%-3s     IN      PTR     %s.mydomain.tld.\n", ipaddr[4], $1}' | sort -n >> db.${NETWORK}.new
    mv db.${NETWORK}.new db.${NETWORK}
done